Intshayelelo yokusetyenziswa kweRF optical transmissionRF phezu kweFayibha
Kumashumi eminyaka akutshanje, unxibelelwano lwe-microwave kunye netekhnoloji yonxibelelwano lwe-optical luphuhliswe ngokukhawuleza. Zombini ezi teknoloji zenze inkqubela enkulu kumacandelo azo, kwaye zikhokelele kuphuhliso olukhawulezayo lonxibelelwano oluphathwayo kunye neenkonzo zothumelo lwedatha, nto leyo izisa uncedo olukhulu kubomi babantu. Itekhnoloji ezimbini zonxibelelwano lwe-microwave kunye nonxibelelwano lwefoto yombane zineenzuzo zazo, kodwa zikwanazo nezinto ezingeloncedo ezingenakoyiswa. Ukuhanjiswa kwe-Photoelectric kufuna uthungelwano lomzimba, kwaye kukho ukusilela kokuguquguquka, uthungelwano olukhawulezayo kunye nokuhamba kolwakhiwo. Unxibelelwano lweMicrowave luneziphene ezithile kuthumelo lomgama omde kunye nomthamo omkhulu, kwaye i-microwave idinga ulwandiso rhoqo lwe-relay kunye nokudluliselwa kwakhona, kwaye i-bandwidth yothumelo inqunyelwe yi-frequency carrier. Oku kukhokelele ekudityanisweni kwetekhnoloji ye-microwave kunye ne-optical Fiber transmission, oko kukuthi, ubuchwepheshe beRadio over Fiber(ROF), obudla ngokubizwa ngokuba bubuchwephesha.RF phezu kweFayibha, okanye iteknoloji yeremote yerediyo. Elona candelo lisetyenziswa kakhulu kwi-RF ngaphezulu kwetekhnoloji yeFayibha licandelo lonxibelelwano lwefiber optical, kubandakanya nezikhululo ezisisiseko eziphathwayo, iinkqubo ezisasazwayo, ibroadband engenazingcingo, iTV yentambo, unxibelelwano lwenethiwekhi yabucala njalo njalo. Kwiminyaka yakutshanje, ngokunyuka kweefotonic ze-microwave, i-RF phezu kwe-Fiber iteknoloji isetyenziswe ngokubanzi kwi-microwave photon radar, unxibelelwano lwe-UAV, uphando ngeenkwenkwezi kunye nezinye iinkalo. Ngokweentlobo ezahlukeneyo zokumodareyitha kwelaser, unxibelelwano lwelaser lunokwahlulwa lube lumodareyitha lwangaphakathi kunye nohlengahlengiso lwangaphandle, oluqhele ukusetyenziswa lumodareyitha lwangaphandle, kunye neRF phezu kweFiber esekwe kwimodyuli yangaphandle yelaser ichazwe kweli phepha. I-RF phezu kweFayibha amakhonkco enziwa ikakhulu yi-optical transceiver, transmission, kunyeROF amakhonkco, njengoko kubonisiwe kulo mfanekiso ulandelayo:
Intshayelelo emfutshane kwindawo yokukhanya. I-LD isetyenziswa ngokuqhelekileyoIilaser zeDFB(uhlobo lwempendulo esasazwayo), ezisetyenziselwa ingxolo ephantsi, usetyenziso oluphezulu oluguquguqukayo oluphezulu, kunye ne-FP(Fabry-Perot type) lasers zisetyenziselwa izicelo ezingaphantsi kwemfuneko. Awona maza aqhele ukusetyenziswa yi-1064nm kunye ne-1550nm. I-PD yiifotodetector, kwaye kwelinye icala lekhonkco ye-fiber optic, ukukhanya kuchongwa yi-PIN photodiode ye-receiver, eguqula ukukhanya ibe ngumqondiso wombane kwaye emva koko kwisinyathelo esiqhelekileyo sokulungiswa kombane. I-fiber optical esetyenziselwa uxhulumaniso oluphakathi idla ngokuba yimowudi enye kunye ne-multi-mode optical fiber. I-fiber yemodi enye iqhele ukusetyenziswa kwinethiwekhi ye-backbone ngenxa yokusasazeka kwayo okuphantsi kunye nokulahlekelwa okuphantsi. Ifayibha yeMultimode inesicelo esithile kuthungelwano lwendawo yasekhaya kuba ingabizi kakhulu ukuyivelisa kwaye inokwamkela usasazo oluninzi ngaxeshanye. Ukuncitshiswa kwesignali ye-optical kwifiber kuncinci kakhulu, kuphela ~ 0.25dB / km kwi-1550nm.
Ngokusekwe kwiimpawu zothumelo lomgca kunye nokuhanjiswa kwe-optical, amakhonkco e-ROF anezi nzuzo zilandelayo zobugcisa:
• Ilahleko ephantsi kakhulu, i-fiber attenuation engaphantsi kwe-0.4 dB/km
• Ukuhanjiswa kweFayibha ultra-bandwidth, ilahleko yefayibha ezimeleyo kumaza
• Ikhonkco elinomthamo ophezulu wokuthwala umthamo/i-bandwidth ukuya kuthi ga kwi-110GHz• Ungenelelo lwe-Electromagnetic Interference (EMI) ukumelana (imozulu embi ayiluchaphazeli uphawu)
• Ixabiso eliphantsi ngemitha nganye • Ifayibha ibhetyebhetye ngakumbi kwaye ikhaphukhaphu, inobunzima obumalunga ne-1/25 ye-waveguide kunye ne-1/10 yentambo ye-coaxial
• Ulungiselelo olulula noluguquguqukayo lweemodyuli ze-electro-optic (yezonyango kunye neenkqubo zokucinga ngoomatshini)
Ixesha lokuposa: Mar-11-2025